Appliance for telephones.



J. L. CREVEUNG.

APPLIANCE FOR TELEPHONES.

APPLICATION FILED SEPT-Z4, 1908.

Patented July 6, 1915.

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% lf/gentor:

J. L. CREVELING.

APPLIANCE FOR TELE'PHONES. APPL'CATION man s;PT.24. i908.

L193; Patented July 6, 1915.

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part thereof.

nip.

JOHhl L. CREVELING, OF NEW YORK, N. Y.

APPLIANCE ran rnzcnrn'onns.

To all whom it may concern:

Be it known that 1', JOHN L. CnnvnLrNc, a citizen of the United States,'residing in the city, county, and State of New York, have invented a certain new and useful Improvement in Appliances for Telephones, of which the following is a specification,'ref erence being had to the drawing, forminga My invention pertains to that class of appliances for telephones intended to be used in connection with the receiver of an ordinary telephone instrument and render the impulses emitted dible.

My invention has for its particular object to cause the vibrations set up inthe receiver to be transmitted to both ears of an operator instead of one only as usual, and to lessen the annoyance caused to an operator by extraneous sounds which usually disturb an operator using the ordinary single receiver,

thereby more readily au- WhlCl'l leaves one ear open to the efiect of such sounds.

fifIt is a further object of myinvention to provide a simple and inexpensive device which may accomplish the above purposes use without section of a vpliance in one form in which it may be used. 7 Fig. II. is a sectional elevation of a portion and be readily applied to telephones now in defaci the same and which may be readily hel in operative position upon. the operator, if desired, without the Iuse of the hands.

Figure I. is an elevation shown partly in portion of my improved apimproved appliance attached to a telephone receiver in one manner in which it may be applied. thereto. Fig. III. shows an and elevation of the portion of my appliance shown in section in Fig. II., the same bein as viewed from the left of Fig. H; F ig. is an elevation shown partially in section of my improved appliance provided with means forholding the same in operative position upon the head of the user. spring or holding device which portion is broken away in Fig. IV. for the sake of clearness in. illustration.

In Fig. l. (1) represents a portionof the ordinary telephone receiver provided with a cap or car piece (2),. (3) represents one ear piece of my improved may resemble the ear piece 2) (4.) or other Specification of Letters Patent.

Fig. V. shows a portion of the head" a pliance which Patented ma a, rats.

Application filed September 24, 1908. Serial No. 454,518. I

' equivalent means whereby said ear piece (3) may be substituted for the ear piece (2) upon the ordinary receiver (1) in such manner that the vibrations set up by the diaphragm of the receiver (1) will be audible through the aperture (5). (6) represents a sound cavity in the ear piece (3) with which communicates the nipple (7). of the sound tube (8) which, at its other extremity is provided with the nipple (9) com1nunieating with the cavity (10) of the ear piece (11). The ear piece (3) a circumferential groove (12), the functions of which will hereinafter more plainly appear.

In. Fig. II. the ear piece (3) is shown as placed in operative position. upon thereceiver (1) and held in such operative position by the clips or fingers (14) carried by the spring ring (13) which is sprung into the groove (12).

Fig. HI. more plainly shows a preferred shape of the sound cavity (6) and the spring ring (13) together with its clips or fingers (14L).

In Fig. IV. the ear pieces and (11) are shown as operatively connected by the sound tube (8) as in Fig. I. and united by a head spring or holding device composed of the wires (16) and (17) united by the clip (18) and formed at one end into the shape of a spring ring (15) adapted to engage a circumferential groove (12) of the ear piece (3), and formed into a spiral (19) at the other end in such manner as to firmly engage the lug (20) of the ear piece 11).

Fig. V. shows more piainly the spring ring portion which is shown partially in section'of Fig. IV.

The operation of my improved device is as follows: If desired to attach my device permanently to the telephone receiver, the cap (2) may be removed and the ear piece (3) screwed upon the receiver (1) in its stead. Then by placing the ear piece (3) to. one ear and the ear piece (11) to the other, 'the sound emitted by the receiver will be audible to each ear of the operator and the ear piece (11) will serve to eliminate the disturbance usually caused by outside noises. If desired'to use my appliance without in any way altering the telephone receiver the said receiver may be placed against the ear piece (3) which may be held in placebetween the receiver and the ear of the operator the position shown in Fig;

is provided with which the spring ring hands free,

. i the boss (20).

Thus arranged IL, and the ear piece (11) may be placed against the other ear in described.

If desired to automatically hold the ear piece (3) in such operative position upon the receiver and in such manner that it may be readily detached or applied as desired, this may be readily accomplished by the construction shown in Eigs. II. and III. in (13) carrying thefingers (14:) is shown as sprung into the groove (12) in such manner as to firmlygrip the ear piece (3). The ear piece (3) may then be pressed against the ear iece (2) in such manner that the clips or ngers (14) will spring over the edge of the earpiece (2) in such manner as to hold the ear piece (3) in operative relation thereto. e If desired to'hold the ear pieces upon operator in such manner as to leave.

the manner above the he Figs. IV. and V. may be employed by sim-" ply detaching the nipple (9) from the ear piece 11) then separating the wires- (16)- and (1 in such manner as to open up the spiral spring (19) into which ma then be readily pressed the boss (20), an then relieving the wires (16) and (17) willallow the spiral (19-) to close up and firmly grip Then the nipple (9) may be again screwed into the ear piece (11) and the ear piece (3) sprung into the ring (15) in such manner that the said ring will firmly engage the groove (12) and hold the ear piece in the position shown in the drawing.

the ear pieces may be separated "nd placed'upon the ears of an operator and the ordinary telephone receiver when placed-in operative relation to the ear ried entirely upon piece (3) will have its sound waves carried to both cars of the operator.

It will be noted th t with this arrangemcnt the receiver of the telephone is in no way attached to my appliance whichis carthe operator, and that the operatorris free to move away from the telephone without the annoyance of having to remoyc any portion ot'iny apparatus unless desired. v

I do not wish 1n any way to hunt mysel't provided with a circumferential groove, and

means lying in said groove having resilient fingers \engaging .the ear piece of the telephone receivfer for holding the ear pieces in operative relation. g 2, The'combination with an ear piece for telephone service provided with a circumferthe head spring as shown in adapted to operatively engage, theea'r piece ofsaid receiver, said second car piece being provided with a circumferential groove and means lying in said groove having fingers engaging the ear piece of the telephone receiver for holding the ear pieces in operative relation.

. 4, The combination with an ear piece for telephone service provided with a circumferential groove, of a resilient band for engaging said groove, said band having fingers to hold said ear piece in operative position upon a telephone receiver, extending therefrom at a right angle thereto, in the same general direction and converging toward each other.

JOHN L. CREVE'LTNG.

Witnesses l; J. S'rooKLnY,

Jonx T. CLARK. v

piece of 

